class_docstr: Initiate a tracktor based on an object detetor.
class_docstr_tok: ["Initiate","a","tracktor","based","on","an","object","detetor","."]
code: def anchors(self):
      if self.detector.anchor_tensor is None:
          raise ValueError("anchor not initialized yet")
      return self.detector.anchor_tensor
  
file_path: gluon-cv/gluoncv/model_zoo/smot/tracktors.py
imports: from abc import ABC, abstractmethod
  import numpy
  import mxnet
  from .utils import timeit
  from .general_detector import GeneralDetector
label_desc: Use image node_id 2 for calling the GluonSSDMultiClassTracktor obj's underlying member method code with example usage: obj.anchors() and returns: self